Bug 1491698 (CVE-2017-13082)

Summary: CVE-2017-13082 wpa_supplicant: Accepting a retransmitted FT Reassociation Request and reinstalling the pairwise key while processing it
Product: [Other] Security Response Reporter: Adam Mariš <amaris>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact: Ken Benoit <kbenoit>
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: bgalvani, blueowl, dcaratti, dcbw, linville, lkundrak, negativo17, security-response-team, slawomir, sukulkar
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: If docs needed, set a value
Doc Text:
A new exploitation technique called key reinstallation attacks (KRACK) affecting WPA2 has been discovered. A remote attacker within Wi-Fi range could exploit this attack to decrypt Wi-Fi traffic or possibly inject forged Wi-Fi packets by reinstalling a previously used pairwise key (PTK-TK) by retransmitting Fast BSS Transition (FT) Reassociation Requests.
 Story Points: ---
Clone Of: Environment:
Last Closed: 2017-10-19 08:47:45 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 1495527, 1495528, 1502588, 1502589    
Bug Blocks: 1491701    

Description Adam Mariš 2017-09-14 12:32:10 UTC 
A new exploitation technique called key reinstallation attacks used to break Wi-Fi handshakes that negotiate session keys was discovered. These attacks target the Wi-Fi/WPA2 standard. An adversary can trick a vulnerable Access Point (AP) into reinstalling the pairwise key by retransmitted or replayed FT Reassociation Request. While reinstalling the already in-use key, the associated packet number (sometimes also called nonce) and receive replay counter is reset. This causes nonce reuse, voiding any security the underlying encryption protocol is supposed to provide. For example, it allows decryption or injection of frames, and enables an attacker to replay frames.
Comment 1 Adam Mariš 2017-09-14 12:32:14 UTC 
Acknowledgments:

Name: CERT
Upstream: Mathy Vanhoef (University of Leuven)
Comment 8 Andrej Nemec 2017-10-16 09:43:41 UTC 
Created hostapd tracking bugs for this issue:

Affects: fedora-all [bug 1502588]


Created wpa_supplicant tracking bugs for this issue:

Affects: fedora-all [bug 1502589]
Comment 10 Stefan Cornelius 2017-10-17 09:41:42 UTC 
External References:

https://access.redhat.com/security/vulnerabilities/kracks
https://w1.fi/security/2017-1/wpa-packet-number-reuse-with-replayed-messages.txt
https://www.krackattacks.com/
Comment 13 errata-xmlrpc 2017-10-17 21:40:21 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2017:2907 https://access.redhat.com/errata/RHSA-2017:2907
Comment 14 Stefan Cornelius 2017-10-18 08:49:47 UTC 
Statement:

This issue did not affect the versions of wpa_supplicant as shipped with Red Hat Enterprise Linux 5 and 6.

This issue affects the versions of wpa_supplicant as shipped with Red Hat Enterprise Linux 7.